https://github.com/google/guava/guava: Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more. 
class com.google.common.collect.MutableClassToInstanceMap$1 extends com.google.common.collect.ForwardingMapEntry<java.lang.Class<? extends B>, B>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.google.common.collect.MutableClassToInstanceMap$1
  super_class: com.google.common.collect.ForwardingMapEntry
{
  private final java.util.Map$Entry val$entry;
    descriptor: Ljava/util/Map$Entry;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(java.util.Map$Entry);
    descriptor: (Ljava/util/Map$Entry;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.google.common.collect.MutableClassToInstanceMap$1 this
         0: .line 81
            aload 0 /* this */
            aload 1
            putfield com.google.common.collect.MutableClassToInstanceMap$1.val$entry:Ljava/util/Map$Entry;
            aload 0 /* this */
            invokespecial com.google.common.collect.ForwardingMapEntry.<init>:()V
            return
        end local 0 // com.google.common.collect.MutableClassToInstanceMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/MutableClassToInstanceMap$1;
    MethodParameters:
           Name  Flags
      val$entry  final

  protected java.util.Map$Entry<java.lang.Class<? extends B>, B> delegate();
    descriptor: ()Ljava/util/Map$Entry;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.google.common.collect.MutableClassToInstanceMap$1 this
         0: .line 84
            aload 0 /* this */
            getfield com.google.common.collect.MutableClassToInstanceMap$1.val$entry:Ljava/util/Map$Entry;
            areturn
        end local 0 // com.google.common.collect.MutableClassToInstanceMap$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/google/common/collect/MutableClassToInstanceMap$1;
    Signature: ()Ljava/util/Map$Entry<Ljava/lang/Class<+TB;>;TB;>;

  public B setValue();
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.google.common.collect.MutableClassToInstanceMap$1 this
        start local 1 // java.lang.Object value
         0: .line 89
            aload 0 /* this */
            aload 0 /* this */
            invokevirtual com.google.common.collect.MutableClassToInstanceMap$1.getKey:()Ljava/lang/Object;
            checkcast java.lang.Class
            aload 1 /* value */
            invokestatic com.google.common.collect.MutableClassToInstanceMap.cast:(Ljava/lang/Class;Ljava/lang/Object;)Ljava/lang/Object;
            invokespecial com.google.common.collect.ForwardingMapEntry.setValue:(Ljava/lang/Object;)Ljava/lang/Object;
            areturn
        end local 1 // java.lang.Object value
        end local 0 // com.google.common.collect.MutableClassToInstanceMap$1 this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/google/common/collect/MutableClassToInstanceMap$1;
            0    1     1  value  TB;
    Signature: (TB;)TB;
    MethodParameters:
       Name  Flags
      value  

  protected java.lang.Object delegate();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1044) ACC_PROTECTED, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual com.google.common.collect.MutableClassToInstanceMap$1.delegate:()Ljava/util/Map$Entry;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lcom/google/common/collect/ForwardingMapEntry<Ljava/lang/Class<+TB;>;TB;>;
SourceFile: "MutableClassToInstanceMap.java"
EnclosingMethod: com.google.common.collect.MutableClassToInstanceMap.checkedEntry:(Ljava/util/Map$Entry;)Ljava/util/Map$Entry;
NestHost: com.google.common.collect.MutableClassToInstanceMap
InnerClasses:
  com.google.common.collect.MutableClassToInstanceMap$1
  public abstract Entry = java.util.Map$Entry of java.util.Map